Process for the manufacture of aluminum nitrid.



O. SERPEK.

PROCESS FOR THE MANUFACTURE OF ALUMINUM NITRID.

APPLICATION FILED Aue.1.191e.

1,233,926. atentd July 17, 1917.

. bauxite, alumina or an apparatus capable of OTTOKAR SERPEK, or

NITRURES, or

PARIS, FRANCE, ASSIGNOR TO SOCIETE GENERALE DES PARIS, FRANCE, A CORPORATION OF FRANCE.

PROCESS FOR THE MANUFACTURE OF ALUMINUM NITRID.

7 To all whom it may concern:

Be it known that I, OTTOKAR SERPEK, a

" subject of the Emperor of Austria, of Tzech nationality, and a resident of 12 Rue Roqupine, Paris, France, have invented a new and useful Process for the Manufacture of Aluminium N itrids, of Which the following is a specification.

other alumi'nous compound and carbon,:is subjected to the action of a flame produced by the combustion of an excess of carbon in air, in such a manner that this combustion yields almost exclusively oxid of carbon, after this flame has een heated by its passage through or across one or more electric arcs, the reaction of for mation of the nitrid being able to be completed, if necessary, by the passage of the reactionary mixture across one or more elec-' tr1c arcs.

The present invention is a modification of the process of obtaining aluminum nitrid, forming the subject of my Pat. 1,21 ,119,

The invention is hereafter described in detail, with reference to the annexed drawing which shows, by way of example in Figure 1, in longitudinal-vertical section, serving for the carrying out of the process. Fig. 2 is a similar view of a modification.-

The air, forced by any suitable pump A, passes first into a heating chamber B where it is heated to a high temperature. The gaseous current afterward traverses a parrower passage into which falls, from a hopper-C, powdered carbon. The carbon is 1 nited passage across one or more electric arcs D. The charge of carbon falling from the hop- ,per C, is regulated in such a way that there 1s not merel bastion of the heated air but enough of an excess of 'carbon to reduce the resulting carbonic 'acid (C0,) to carbonic oxid (CO).

Specification of Letters Patent. Application filed August 1, 1916.

bon exactly necessary for Patented July 17, 1917. Serial No. 112,595. I

v may be supplied hopper ,C onlythe quantity of carthe total combusand carbon be added which effect the reduction of CO into CO, by means of a hopper (not shown on the drawing) immediately before the pas- If desired, however, there from the tion of the air temperature, being able to exceed 2000 C, receives from a hopper E the reaction mixture (bauxite, alumina or other aluminous compound and carbon or other reducing The quantity of carbon'necessary to the reaction for formation of the nitrid might have been already added in the hop per C, before the passage of the flame across t e one or more arcs D or between per C and one or more arcs D; only the aluminouscompound is supplied from the hopper E. The reaction of formation of the nitrid of aluminum takes place, by reason of the high temperature attained, between the aluminous compound, the carbon and the nitrogen; this reaction can be completed, if necessary, by the passage of the reaction mixture through one or more arcs portion arrange one or more arcs as indicated at G in the modification Fig. 2.

The electric" arcs may obviously be recal heating device; the the present. invention can be, moreover, carried out in. a horizontal furnace or a vertical furnace of any suitable construction.

I claim as my invention,

1. A process for the manufacture of aluminum nitrid, consisting in powdered aluminous material and a powdered igh this hopin this case flame by the combustion, of

electric arc,

carbon monoxid and heating said flame to a very high temperature by its passage air, with the production of almost exclusively carbon monoxi and heating sai flame to a very high temperature by its passage through .an electric heating zone before it is brought into the presence of the mixture of aluminous material and carbon and com )leting the reaction of the formationof the nitrid by the passage of the reacting mixture through an electric heating zone.

3. A process for the manufacture of aluminum nitrid, consisting in producing a flame by the combustion of an excess of carbon in air, projecting this flame through an and introducing into the traveling flame thus highly heated a powdered mixture of aluminous material and carbon. a. A process for the manufacture of aluminum nitrid, consisting in producing a the combustion 0 an excess 0 carbon in air, projecting this flame through aluminum nitrid, comprising introducing into the travelan electric are, I

highly heated a powdered ing flame thus mixture of the reaction of the formation of the nitrid by the passage of the reacting mixture through an electric arc. 5. An apparatus for the manufacture of aluminum nitrid, comprising a supply, a passage therefrom, arc-producing electrodes in said passage, means for supplying powdered carbon to the passage in advance of the electrodes and means for supplying powdered luminous material an carbon to the heated flame, coming from sai electrodes. 6. An apparatus for the manufacture of a forced air therefrom, arc-producing electrodes in the passage, means for supplying powdered carbon to the passage in advance of the electrodes, means for supplying powdered aluminous material and carbon to the heated flame, and a second set of arcproducing electrodes to complete the.reaction. i j y In testimony whereof I have signed thy name to this specification, in the presence of two subscribing witnesses. O KAR SERPEK.

supply, a passage TTO Witnesses CHARLES WREN, M. Durimzmronr.

aluminous material and carbon and completing forced air 40 

